Welcome to the Bunnings Workshop community @CarmelC. It's terrific that you've joined us, and many thanks for your question about pool pump covers.
You might like to read through this previous discussion: How to make a wooden pool pump cover by @lbell. Within it, we discuss some ways to construct a slatted pool pump cover with a lid. You could adapt this design to include two doors at the front.
I'm a huge fan of using products like this Lattice Makers 1800 x 900mm Hardwood Slat Screen in these types of builds. If you work with their sizes, you could easily clad the pool pump with this screening. You could even cut it down to use as the doors. Using pre-made panels like these will save heaps of time with your project, and they look fantastic.
Once you've looked at the discussion I've linked to above, let me know if you have any questions, and then we can work on a design that you like.